Teen in the 00s here. It happened befor the documentation - really I think to a degree it was the related intersection of "juvennile delinquient" moral panics, crackdowns, zero tolerance, and general frankly batshit paranoia where the definition of being a "good guardian" amounts to operating a panopticon which ignores life traumatizing bullying and blames the victim yet freaks out at anything which goes against their precious norms even if perfectly legal. Granted the latter bullshit has a long legacy in American culture.